I do wonder if some of this is attirbutable to having spent some time in these 'dry' countries. Not that it is an excuse to climb inside a a bottle the minute you leave, but I do believe that a lot of people do not consider the consequences of abstaining for a period of time.
After a self enforced 'dry'period (post xmas diet!

) I did get embarrasingly drunk the first night out after my period off.
It snuck up so quickly that I didn't see coming in the slightest. And the amount I had drunk was compartively small compared to what my tolerance was previously. Maybe airlines need to consider this fact when operating out of the booze free countries.